On 3 November 2015 at 18:37, Borja Salazar <[email protected]> wrote:
> When channel context is enabled, we could be
> stopping/awakening an incorrect queue.
> ---
> drivers/net/wireless/ath/ath9k/xmit.c | 22 ++++++++++++----------
> 1 file changed, 12 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/net/wireless/ath/ath9k/xmit.c
> b/drivers/net/wireless/ath/ath9k/xmit.c
> index 3e3dac3..9b17a59 100644
> --- a/drivers/net/wireless/ath/ath9k/xmit.c
> +++ b/drivers/net/wireless/ath/ath9k/xmit.c
> @@ -147,7 +147,12 @@ static void ath_txq_skb_done(struct ath_softc *sc,
> struct ath_txq *txq,
> {
> struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
> struct ath_frame_info *fi = get_frame_info(skb);
> - int q = fi->txq;
> + int q;
> +
> + if (ath9k_is_chanctx_enabled())
> + q = fi->txq;
> + else
> + q = info->hw_queue;
>
> if (q < 0)
> return;
> @@ -158,10 +163,7 @@ static void ath_txq_skb_done(struct ath_softc *sc,
> struct ath_txq *txq,
>
> if (txq->stopped &&
> txq->pending_frames < sc->tx.txq_max_pending[q]) {
> - if (ath9k_is_chanctx_enabled())
> - ieee80211_wake_queue(sc->hw, info->hw_queue);
> - else
> - ieee80211_wake_queue(sc->hw, q);
> + ieee80211_wake_queue(sc->hw, q);
> txq->stopped = false;
> }
> }
> @@ -2299,17 +2301,17 @@ int ath_tx_start(struct ieee80211_hw *hw, struct
> sk_buff *skb,
> * info are no longer valid (overwritten by the ath_frame_info data.
> */
>
> - q = skb_get_queue_mapping(skb);
> + if (ath9k_is_chanctx_enabled())
> + q = skb_get_queue_mapping(skb);
> + else
> + q = info->hw_queue;
>
> ath_txq_lock(sc, txq);
> if (txq == sc->tx.txq_map[q]) {
> fi->txq = q;
> if (++txq->pending_frames > sc->tx.txq_max_pending[q] &&
> !txq->stopped) {
> - if (ath9k_is_chanctx_enabled())
> - ieee80211_stop_queue(sc->hw, info->hw_queue);
> - else
> - ieee80211_stop_queue(sc->hw, q);
> + ieee80211_stop_queue(sc->hw, q);
> txq->stopped = true;
> }
> }
> --
> 2.3.6
>
Hello, could you check it again?
I see such patch that enable hw_queues only for MCC and disable for
non-MCC mode.
ath9k: Enable HW queue control only for MCC
Enabling HW queue control for normal (non-mcc) mode
causes problems with queue management, resulting
in traffic stall. Since it is mainly required for
fairness in MCC mode, disable it for the general case.
Bug: https://dev.openwrt.org/ticket/18164
BR
Janusz
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